AT25128B and AT25256B
SPI Serial EEPROM
128K (16,384 x 8), 256K (32,768 x 8)
DATASHEET
Features
Serial Peripheral Interface (SPI) Compatible
Supports SPI Modes 0 (0,0) and 3 (1,1)
̶
Data Sheet Describes Mode 0 Operation
Low-voltage and Standard-voltage Operation
̶
VCC = 1.8V to 5.5V
20MHz Clock Rate (5V)
64-byte Page Mode and Byte Write Operation
Block Write Protection
̶
Protect 1/4, 1/2, or Entire Array
Write Protect (WP) Pin and Write Disable Instructions for Both Hardware and
Software Data Protection
Self-timed Write Cycle (5ms max)
High Reliability
̶
̶
Endurance: 1,000,000 Write Cycles
Data Retention: 100 Years
Green (Pb/Halogen-free/RoHS Compliant) Packaging Options
Die Sales: Wafer Form, Waffle Pack, and Bumped Wafers
Description
The Atmel® AT25128B/256B provides 131,072/262,144 bits of Serial Electrically
Erasable Programmable Read-Only Memory (EEPROM) organized as
16,384/32,768 words of 8 bits each. The device is optimized for use in many
industrial and commercial applications where low-power and low-voltage
operation are essential. The AT25128B/256B is available in space saving JEDEC
SOIC, TSSOP, UDFN, and VFBGA packages.
The AT25128B/256B is enabled through the Chip Select pin (CS) and accessed
via a 3-Wire interface consisting of Serial Data Input (SI), Serial Data Output (SO),
and Serial Clock (SCK). All programming cycles are completely self-timed, and no
separate erase cycle is required before write.
Block Write protection is enabled by programming the status register with one of
four blocks of Write Protection. Separate Program Enable and Program Disable
instructions are provided for additional data protection. Hardware Data Protection
is provided via the WP pin to protect against inadvertent write attempts. The
HOLD pin may be used to suspend any serial communication without resetting the
serial sequence.
Atmel-8698E-SEEPROM-AT25128B-256B-Datasheet_012015
1.
Pin Configurations
Table 1-1.
Pin Configurations
Pin Name
Function
CS
Chip Select
GND
Ground
HOLD
Suspends Serial Input
SCK
Serial Data Clock
SI
Serial Data Input
SO
Serial Data Output
VCC
Power Supply
WP
Write Protect
8-lead TSSOP
8-lead SOIC
CS
1
8
VCC
SO
2
7
HOLD
WP
3
6
SCK
GND
4
5
SI
CS
SO
WP
GND
1
2
3
4
8
7
6
5
VCC
HOLD
SCK
SI
Top View
Top View
8-ball VFBGA
8-pad UDFN
VCC 8
1
CS
VCC
8
1
CS
HOLD 7
2
SO
HOLD
7
2
SO
SCK 6
3
WP
SCK
6
3
WP
SI 5
4
GND
SI
5
4
GND
Bottom View
Note:
2.
Drawings are not to scale.
Absolute Maximum Ratings*
Operating Temperature . . . . . . . . . . .-55C to +125C
Storage Temperature . . . . . . . . . . . . .-65C to +150C
Voltage on any pin
with respect to ground . . . . . . . . . . . . . -1.0V to +7.0V
Maximum Operating Voltage . . . . . . . . . . . . . . . 6.25V
DC Output Current . . . . . . . . . . . . . . . . . . . . . . .5.0mA
2
Bottom View
AT25128B/256B [DATASHEET]
Atmel-8698E-SEEPROM-AT25128B-256B-Datasheet_012015
*Notice: Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent
damage to the device. This is a stress rating
only and functional operation of the device at
these or any other conditions beyond those
indicated in the operational sections of this
specification is not implied. Exposure to
absolute maximum rating conditions for
extended periods may affect device reliability.
3.
Block Diagram
Figure 3-1.
Block Diagram
VCC
Status
Register
Memory Array
16,384/32,768 x 8
Address
Decoder
Data
Register
Output
Buffer
Mode
Decode
Logic
Clock
Generator
AT25128B/256B [DATASHEET]
Atmel-8698E-SEEPROM-AT25128B-256B-Datasheet_012015
3
4.
Electrical Characteristics
4.1
Pin Capacitance (1)
Table 4-1.
Pin Capacitance
Applicable over recommended operating range from TA = 25°C, f = 1MHz, VCC = +5V (unless otherwise noted).
Symbol
Test Conditions
COUT
CIN
Note:
4.2
1.
Max
Units
Conditions
Output Capacitance (SO)
8
pF
VOUT = 0V
Input Capacitance (CS, SCK, SI, WP, HOLD)
6
pF
VIN = 0V
This parameter is characterized and is not 100% tested.
DC Characteristics
Table 4-2.
DC Characteristics
Applicable over recommended operating range from: TAI = -40C to +85C, VCC = +1.8V to +5.5V, (unless otherwise noted).
Symbol
Parameter
VCC1
Supply Voltage
VCC2
Max
Units
1.8
5.5
V
Supply Voltage
2.5
5.5
V
VCC3
Supply Voltage
4.5
5.5
V
ICC1
Supply Current
VCC = 5V at 20MHz
SO = Open, Read
9
10
mA
ICC2
Supply Current
VCC = 5V at 10MHz
SO = Open, Read, Write
5
7
mA
ICC3
Supply Current
VCC = 5V at 1MHz
SO = Open, Read, Write
2.2
3.5
mA
ISB1
Standby Current
VCC = 1.8V, CS = VCC
0.2
3
μA
ISB2
Standby Current
VCC = 2.5V, CS = VCC
0.5
3
μA
ISB3
Standby Current
VCC = 5.0V, CS = VCC
2
5
μA
IIL
Input Leakage
VIN = 0V to VCC
-3
3
μA
IOL
Output Leakage
VIN = 0V to VCC
TAC = 0°C to 70°C
-3
3
μA
VIL(1)
Input Low-voltage
-1
VCC x 0.3
V
VIH(1)
Input High-voltage
VCC x 0.7
VCC + 0.5
V
VOL1
Output Low-voltage
3.6V VCC 5.5V
IOL = 3.00mA
0.4
V
VOH1
Output High-voltage
3.6V VCC 5.5V
IOH = -1.60mA
VOL2
Output Low-voltage
1.8V VCC 3.6V
IOL = 0.15mA
VOH2
Output High-voltage
1.8V VCC 3.6V
IOH = -100μA
Note:
4
1.
Test Condition
Min
VIL min and VIH max are reference only and are not tested.
AT25128B/256B [DATASHEET]
Atmel-8698E-SEEPROM-AT25128B-256B-Datasheet_012015
Typ
VCC – 0.8
V
0.2
VCC – 0.2
V
V
4.3
AC Characteristics
Table 4-3.
AC Characteristics
Applicable over recommended operating range from TAI = -40 to +85°C, VCC = As Specified, CL = 1 TTL Gate and 30pF
(unless otherwise noted).
Symbol
Parameter
Voltage
Min
Max
Units
fSCK
SCK Clock Frequency
4.5 – 5.5
2.5 – 5.5
1.8 – 5.5
0
0
0
20
10
5
MHz
tRI
Input Rise Time
4.5 – 5.5
2.5 – 5.5
1.8 – 5.5
2
2
2
μs
tFI
Input Fall Time
4.5 – 5.5
2.5 – 5.5
1.8 – 5.5
2
2
2
μs
tWH
SCK High Time
4.5 – 5.5
2.5 – 5.5
1.8 – 5.5
20
40
80
ns
tWL
SCK Low Time
4.5 – 5.5
2.5 – 5.5
1.8 – 5.5
20
40
80
ns
tCS
CS High Time
4.5 – 5.5
2.5 – 5.5
1.8 – 5.5
100
100
200
ns
tCSS
CS Setup Time
4.5 – 5.5
2.5 – 5.5
1.8 – 5.5
100
100
200
ns
tCSH
CS Hold Time
4.5 – 5.5
2.5 – 5.5
1.8 – 5.5
100
100
200
ns
tSU
Data In Setup Time
4.5 – 5.5
2.5 – 5.5
1.8 – 5.5
5
10
20
ns
tH
Data In Hold Time
4.5 – 5.5
2.5 – 5.5
1.8 – 5.5
5
10
20
ns
tHD
Hold Setup Time
4.5 – 5.5
2.5 – 5.5
1.8 – 5.5
5
10
20
ns
tCD
Hold Hold Time
4.5 – 5.5
2.5 – 5.5
1.8 – 5.5
5
10
20
ns
tV
Output Valid
4.5 – 5.5
2.5 – 5.5
1.8 – 5.5
0
0
0
tHO
Output Hold Time
4.5 – 5.5
2.5 – 5.5
1.8 – 5.5
0
0
0
20
40
80
ns
ns
AT25128B/256B [DATASHEET]
Atmel-8698E-SEEPROM-AT25128B-256B-Datasheet_012015
5
Table 4-3.
AC Characteristics (Continued)
Applicable over recommended operating range from TAI = -40 to +85°C, VCC = As Specified, CL = 1 TTL Gate and 30pF
(unless otherwise noted).
Symbol
Parameter
Voltage
Min
Max
Units
tLZ
Hold to Output Low Z
4.5 – 5.5
2.5 – 5.5
1.8 – 5.5
0
0
0
25
50
100
ns
tHZ
Hold to Output High Z
4.5 – 5.5
2.5 – 5.5
1.8 – 5.5
25
50
100
ns
tDIS
Output Disable Time
4.5 – 5.5
2.5 – 5.5
1.8 – 5.5
25
50
100
ns
tWC
Write Cycle Time
4.5 – 5.5
2.5 – 5.5
1.8 – 5.5
5
5
5
ms
Endurance(1)
3.3V, 25C, Page Mode
Note:
5.
1.
1,000,000
Write Cycles
This parameter is characterized and is not 100% tested.
Serial Interface Description
Master: The device that generates the serial clock.
Slave: Because the Serial Clock pin (SCK) is always an input, the AT25128B/256B always operates as a slave.
Transmitter/Receiver: The AT25128B/256B has separate pins designated for data transmission (SO) and
reception (SI).
MSB: The Most Significant Bit (MSB) is the first bit transmitted and received.
Serial Opcode: After the device is selected with CS going low, the first byte will be received. This byte contains
the opcode which defines the operations to be performed.
Invalid Opcode: If an invalid opcode is received, no data will be shifted into the AT25128B/256B, and the serial
output pin (SO) will remain in a high-impedance state until the falling edge of CS is detected again. This will
reinitialize the serial communication.
Chip Select: The AT25128B/256B is selected when the CS pin is low. When the device is not selected, data will
not be accepted via the SI pin, and the SO pin will remain in a high-impedance state.
Hold: The HOLD pin is used in conjunction with the CS pin to select the AT25128B/256B. When the device is
selected and a serial sequence is underway, HOLD can be used to pause the serial communication with the
master device without resetting the serial sequence. To pause, the HOLD pin must be brought low while the
SCK pin is low. To resume serial communication, the HOLD pin is brought high while the SCK pin is low (SCK
may still toggle during HOLD). Inputs to the SI pin will be ignored while the SO pin is in the high-impedance
state.
Write Protect: The Write Protect pin (WP) will allow normal read/write operations when held high. When the
WP pin is brought low and WPEN bit is one, all write operations to the status register are inhibited. WP going
low while CS is still low will interrupt a write to the status register. If the internal write cycle has already been
initiated, WP going low will have no effect on any write operation to the status register. The WP pin function is
blocked when the WPEN bit in the status register is zero. This will allow the user to install the AT25128B/256B
in a system with the WP pin tied to ground and still be able to write to the status register. All WP pin functions
are enabled when the WPEN bit is set to one.
6
AT25128B/256B [DATASHEET]
Atmel-8698E-SEEPROM-AT25128B-256B-Datasheet_012015
Figure 5-1.
SPI Serial Interface
Master:
Microcontroller
Data Out (MOSI)
Data In (MISO)
Serial Clock (SPI CK)
SS0
SS1
SS2
SS3
Slave:
AT25128B/256B
SI
SO
SCK
CS
SI
SO
SCK
CS
SI
SO
SCK
CS
SI
SO
SCK
CS
AT25128B/256B [DATASHEET]
Atmel-8698E-SEEPROM-AT25128B-256B-Datasheet_012015
7
6.
Functional Description
The AT25128B/256B is designed to interface directly with the synchronous Serial Peripheral Interface (SPI) of
the 6800 series of microcontrollers.
The AT25128B/256B utilizes an 8-bit instruction register. The list of instructions and their operation codes are
contained in Figure 6-1. All instructions, addresses, and data are transferred with the MSB first and start with a
high-to-low CS transition.
Table 6-1.
Instruction Set for the AT25010B/020B/040B
Instruction Name
Instruction Format
Operation
WREN
0000 X110
Set Write Enable Latch
WRDI
0000 X100
Reset Write Enable Latch
RDSR
0000 X101
Read Status Register
WRSR
0000 X001
Write Status Register
READ
0000 X011
Read Data from Memory Array
WRITE
0000 X010
Write Data to Memory Array
Write Enable (WREN): The device will power-up in the Write Disable state when VCC is applied. All
programming instructions must therefore be preceded by a Write Enable instruction. The WP pin must be held
high during a WREN instruction.
Write Disable (WRDI): To protect the device against inadvertent writes, the Write Disable instruction disables
all programming modes. The WRDI instruction is independent of the status of the WP pin.
Read Status Register (RDSR): The Read Status Register instruction provides access to the status register.
The Read/Busy and Write Enable status of the device can be determined by the RDSR instruction. Similarly, the
Block Write Protection bits indicate the extent of protection employed. These bits are set by using the WRSR
instruction.
Table 6-2.
Status Register Format
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
WPEN
X
X
X
BP1
BP0
WEN
RDY
Table 6-3.
Read Status Register Bit Definition
Bit
Definition
Bit 0 (RDY)
Bit 0 = 0 (RDY) indicates the device is ready.
Bit 0 = 1 indicates the write cycle is in progress.
Bit 1 (WEN)
Bit 1 = 0 indicates the device is not write enabled.
Bit 1 = 1 indicates the device is write enabled.
Bit 2 (BP0)
See Table 6-4.
Bit 3 (BP1)
See Table 6-4.
Bits 4 to 6 are zeros when the device is not in an internal write cycle.
Bit 7 (WPEN)
See Table 6-5.
Bits 0 to 7 are ones during an internal write cycle.
8
AT25128B/256B [DATASHEET]
Atmel-8698E-SEEPROM-AT25128B-256B-Datasheet_012015
Write Status Register (WRSR): The WRSR instruction allows the user to select one of four levels of protection.
The AT25128B/256B is divided into four array segments. None, one-quarter (¼), one-half (½), or all of the
memory segments can be protected. Any of the data within any selected segment will therefore be read-only.
The block write protection levels and corresponding status register control bits are shown in Table 6-4.
Bits BP1, BP0, and WPEN are nonvolatile cells that have the same properties and functions as the regular
memory cells (e.g., WREN, tWC, RDSR).
Table 6-4.
Block Write Protect Bits
Status Register Bits
Array Addresses Protected
Level
BP1
BP0
AT25128B
AT25256B
0
0
0
None
None
1 (¼)
0
1
3000 – 3FFF
6000 – 7FFF
2 (½)
1
0
2000 – 3FFF
4000 – 7FFF
3 (All)
1
1
0000 – 3FFF
0000 – 7FFF
The WRSR instruction also allows the user to enable or disable the write protect (WP) pin through the use of the
Write Protect Enable (WPEN) bit. Hardware write protection is enabled when the WP pin is low and the WPEN
bit is one. The hardware write protection is disabled when either the WP pin is high or the WPEN bit is zero.
When the device is hardware write protected, writes to the Status Register including the Block Protect bits, the
WPEN bit, and the block protected sections in the memory array are disabled. Writes are only allowed to
sections of the memory which are not block-protected.
Note:
When the WPEN bit is hardware write protected, it cannot be changed back to zero as long as the WP
pin is held low.
Table 6-5.
WPEN Operation
WPEN
WP
WEN
Protected Blocks
Unprotected Blocks
Status Register
0
X
0
Protected
Protected
Protected
0
X
1
Protected
Writable
Writable
1
Low
0
Protected
Protected
Protected
1
Low
1
Protected
Writable
Protected
X
High
0
Protected
Protected
Protected
X
High
1
Protected
Writable
Writable
Read Sequence (READ): Reading the AT25128B/256B via the SO pin requires the following sequence. After
the CS line is pulled low to select a device, the Read opcode is transmitted via the SI line followed by the byte
address to be read (Table 6-6). Upon completion, any data on the SI line will be ignored. The data (D7 – D0) at
the specified address is then shifted out onto the SO line. If only one byte is to be read, the CS line should be
driven high after the data comes out. The Read Sequence can be continued since the byte address is
automatically incremented and data will continue to be shifted out. When the highest address is reached, the
address counter will roll-over to the lowest address allowing the entire memory to be read in one continuous
read cycle.
AT25128B/256B [DATASHEET]
Atmel-8698E-SEEPROM-AT25128B-256B-Datasheet_012015
9
Write Sequence (WRITE): In order to program the AT25128B/256B, the Write Protect pin (WP) must be held
high and two separate instructions must be executed. First, the device must be write enabled via the WREN
instruction. Then a Write (WRITE) instruction may be executed. Also, the address of the memory location(s) to
be programmed must be outside the protected address field location selected by the Block Write Protection
level. During an internal write cycle, all commands will be ignored except the RDSR instruction.
A Write instruction requires the following sequence. After the CS line is pulled low to select the device, the Write
opcode is transmitted via the SI line followed by the byte address and the data (D7 D0) to be programmed
(see Table 6-6 for the address key). Programming will start after the CS pin is brought high. The low-to-high
transition of the CS pin must occur during the SCK low time immediately after clocking in the D0 (LSB) data bit.
The Ready/Busy status of the device can be determined by initiating a Read Status Register (RDSR)
instruction. If Bit 0 is one, the write cycle is still in progress. If Bit 0 is zero, the write cycle has ended. Only the
RDSR instruction is enabled during the write programming cycle.
The AT25128B/256B is capable of an 64-byte Page Write operation. After each byte of data is received, the six
low-order address bits are internally incremented by one; the high-order bits of the address will remain constant.
If more than 64 bytes of data are transmitted, the address counter will roll-over, and the previously written data
will be overwritten. The AT25128B/256B is automatically returned to the Write Disable state at the completion of
a write cycle.
Note:
If the WP pin is brought low or if the device is not Write Enabled (WREN), the device will ignore the Write
instruction and will return to the standby state, when CS is brought high. A new CS falling edge is
required to reinitiate the serial communication.
Table 6-6.
10
Address Key
Address
AT25128B
AT25256B
AN
A13 – A0
A14 – A0
Don’t Care Bits
A15 – A14
A15
AT25128B/256B [DATASHEET]
Atmel-8698E-SEEPROM-AT25128B-256B-Datasheet_012015
7.
Timing Diagrams — SPI Mode 0 (0,0)
Figure 7-1.
Synchronous Data Timing (for Mode 0)
t CS
VIH
CS
VIL
t CSH
tCSS
VIH
t WH
SCK
t WL
VIL
tH
t SU
VIH
Valid In
SI
VIL
tV
VOH
SO
t HO
t DIS
HI-Z
HI-Z
VOL
Figure 7-2.
WREN Timing
CS
SCK
SI
WREN Opcode
HI-Z
SO
Figure 7-3.
WRDI Timing
CS
SCK
SI
SO
WRDI Opcode
HI-Z
AT25128B/256B [DATASHEET]
Atmel-8698E-SEEPROM-AT25128B-256B-Datasheet_012015
11
Figure 7-4.
RDSR Timing
CS
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
SCK
SI
Instruction
Data Out
High-impedance
SO
7
6
5
4
3
2
1
0
8
9
10
11
12
13
14
15
2
1
0
MSB
Figure 7-5.
WRSR Timing
CS
0
1
2
3
4
5
6
7
SCK
Data In
SI
6
5
4
3
High-impedance
SO
Figure 7-6.
7
Instruction
READ Timing
CS
0
1
2
3
4
5
6
7
8
9
10 11 20 21 22 23 24 25 26 27 28 29 30 31
SCK
Byte Address
SI
Instruction
AN
...
A0
Data Out
SO
High-impedance
7
MSB
12
AT25128B/256B [DATASHEET]
Atmel-8698E-SEEPROM-AT25128B-256B-Datasheet_012015
6
5
4
3
2
1
0
Figure 7-7.
WRITE Timing
CS
0
1
2
3
4
5
6
7
8
9 10 11 20 21 22 23 24 25 26 27 28 29 30 31
SCK
Byte Address
SI
SO
Figure 7-8.
15 14 13 ... 3
Instruction
2
Data In
1
0
7
6
5
4
3
2
1
0
High-impedance
HOLD Timing
CS
t CD
t CD
SCK
t HD
HOLD
t HD
t HZ
SO
tLZ
AT25128B/256B [DATASHEET]
Atmel-8698E-SEEPROM-AT25128B-256B-Datasheet_012015
13
8.
Ordering Code Detail
AT2 5 1 2 8 B - S S H L - B
Atmel Designator
Product Family
25 = Standard SPI
Serial EPPROM
Shipping Carrier Option
B or Blank = Bulk (Tubes)
T = Tape and Reel, Standard Quantity Option
E = Tape and Reel, Expanded Quantity Option
Operating Voltage
L
= 1.8V to 5.5V
Device Density
128 = 128 kilobit
256 = 256 kilobit
Device Revision
Package Device Grade or
Wafer/Die Thickness
H = Green, NiPdAu Lead Finish,
Industrial Temperature Range
(-40°C to +85°C)
U = Green, Matte Sn Lead Finish,
Industrial Temperature Range
(-40°C to +85°C)
11 = 11mil Wafer Thickness
Package Option
SS =
X =
MA =
C =
WWU
WDT
14
AT25128B/256B [DATASHEET]
Atmel-8698E-SEEPROM-AT25128B-256B-Datasheet_012015
JEDEC SOIC
TSSOP
UDFN
VFBGA
= Wafer Unsawn
= Die in Tape and Reel
9.
Part Markings
AT25128B and AT25256B: Package Marking Information
8-lead TSSOP
8-lead SOIC
ATMLHYWW
###%
@
AAAAAAAA
ATHYWW
###% @
AAAAAAA
8-pad UDFN
8-ball VFBGA
2.0 x 3.0 mm Body
2.35 x 3.73 mm Body
###
H%@
YXX
Note 1:
###U
@YMXX
designates pin 1
Note 2: Package drawings are not to scale
Catalog Number Truncation
AT25128B
Truncation Code ###: 5DB
AT25256B
Truncation Code ###: 5EB
Date Codes
Y = Year
4: 2014
5: 2015
6: 2016
7: 2017
Voltages
8: 2018
9: 2019
0: 2020
1: 2021
M = Month
A: January
B: February
...
L: December
WW = Work Week of Assembly
02: Week 2
04: Week 4
...
52: Week 52
Country of Assembly
Lot Number
@ = Country of Assembly
AAA...A = Atmel Wafer Lot Number
Trace Code
% = Minimum Voltage
L: 1.8V min
Grade/Lead Finish Material
U: Industrial/Matte Tin/SnAgCu
H: Industrial/NiPdAu
Atmel Truncation
XX = Trace Code (Atmel Lot Numbers Correspond to Code)
Example: AA, AB.... YZ, ZZ
AT: Atmel
ATM: Atmel
ATML: Atmel
3/11/14
TITLE
Package Mark Contact:
DL-CSO-Assy_eng@atmel.com
25128-256BSM, AT25128B and AT25256B Package Marking
Information
DRAWING NO.
REV.
25128-256BSM
A
AT25128B/256B [DATASHEET]
Atmel-8698E-SEEPROM-AT25128B-256B-Datasheet_012015
15
10.
Ordering Information
Delivery Information
Atmel Ordering Code
Lead Finish
Package
AT25128B-SSHL-B
Form
Quantity
Bulk (Tubes)
100 per Tube
Tape and Reel
4,000 per Reel
Bulk (Tubes)
100 per Tube
Tape and Reel
5,000 per Reel
Tape and Reel
5,000 per Reel
Tape and Reel
15,000 per Reel
Tape and Reel
5,000 per Reel
Operation
Range
8S1
AT25128B-SSHL-T
AT25128B-XHL-B
AT25128B-XHL-T
NiPdAu
(Lead-free/Halogen-free)
8X
AT25128B-MAHL-T
8MA2
AT25128B-MAHL-E
AT25128B-CUL-T
SnAgCu
(Lead-free/Halogen-free)
AT25128B-WWU11L (1)
N/A
8U2-1
Wafer
AT25256B-SSHL-B
Industrial
Temperature
(-40 to +85C)
Note 1
Bulk (Tubes)
100 per Tube
Tape and Reel
4,000 per Reel
Bulk (Tubes)
100 per Tube
Tape and Reel
5,000 per Reel
Tape and Reel
5,000 per Reel
Tape and Reel
15,000 per Reel
Tape and Reel
5,000 per Reel
8S1
AT25256B-SSHL-T
AT25256B-XHL-B
AT25256B-XHL-T
NiPdAu
(Lead-free/Halogen-free)
8X
AT25256B-MAHL-T
8MA2
AT25256B-MAHL-E
AT25256B-CUL-T
SnAgCu
(Lead-free/Halogen-free)
AT25256B-WWU11L (1)
Note:
1.
N/A
8U2-1
Wafer
Industrial
Temperature
(-40 to +85C)
Note 1
Contact Atmel Sales for Wafer sales.
Package Type
16
8S1
8-lead, 0.15" wide, Plastic Gull Wing Small Outline (JEDEC SOIC)
8X
8-lead, 4.40mm body, Plastic Thin Shrink Small Outline Package (TSSOP)
8MA2
8-pad, 2.00mm x 3.00mm body, 0.50mm pitch, Plastic Ultra Thin Dual Flat No Lead (UDFN)
8U2-1
8-ball, 2.35mm x 3.73mm body, 0.75mm pitch, Very Thin, Fine-Pitch Ball Grid Array (VFBGA)
AT25128B/256B [DATASHEET]
Atmel-8698E-SEEPROM-AT25128B-256B-Datasheet_012015
11.
Packaging Information
11.1
8S1 — 8-lead JEDEC SOIC
C
1
E
E1
L
N
Ø
TOP VIEW
END VIEW
e
b
COMMON DIMENSIONS
(Unit of Measure = mm)
A
A1
D
SIDE VIEW
Notes: This drawing is for general information only.
Refer to JEDEC Drawing MS-012, Variation AA
for proper dimensions, tolerances, datums, etc.
SYMBOL MIN
A
1.35
NOM
MAX
–
1.75
A1
0.10
–
0.25
b
0.31
–
0.51
C
0.17
–
0.25
D
4.80
–
5.05
E1
3.81
–
3.99
E
5.79
–
6.20
e
NOTE
1.27 BSC
L
0.40
–
1.27
Ø
0°
–
8°
6/22/11
Package Drawing Contact:
packagedrawings@atmel.com
TITLE
8S1, 8-lead (0.150” Wide Body), Plastic Gull Wing
Small Outline (JEDEC SOIC)
GPC
SWB
DRAWING NO.
REV.
8S1
G
AT25128B/256B [DATASHEET]
Atmel-8698E-SEEPROM-AT25128B-256B-Datasheet_012015
17
11.2
8X — 8-lead TSSOP
C
1
Pin 1 indicator
this corner
E1
E
L1
N
L
Top View
End View
A
b
A1
e
D
SYMBOL
Side View
Notes:
COMMON DIMENSIONS
(Unit of Measure = mm)
A2
1. This drawing is for general information only.
Refer to JEDEC Drawing MO-153, Variation AA, for proper
dimensions, tolerances, datums, etc.
2. Dimension D does not include mold Flash, protrusions or gate
burrs. Mold Flash, protrusions and gate burrs shall not exceed
0.15mm (0.006in) per side.
3. Dimension E1 does not include inter-lead Flash or protrusions.
Inter-lead Flash and protrusions shall not exceed 0.25mm
(0.010in) per side.
4. Dimension b does not include Dambar protrusion.
Allowable Dambar protrusion shall be 0.08mm total in excess
of the b dimension at maximum material condition. Dambar
cannot be located on the lower radius of the foot. Minimum
space between protrusion and adjacent lead is 0.07mm.
5. Dimension D and E1 to be determined at Datum Plane H.
MIN
NOM
MAX
A
-
-
1.20
A1
0.05
-
0.15
A2
0.80
1.00
1.05
D
2.90
3.00
3.10
2, 5
E
NOTE
6.40 BSC
E1
4.30
4.40
4.50
3, 5
b
0.19
0.25
0.30
4
e
L
0.65 BSC
0.45
L1
C
0.60
0.75
1.00 REF
0.09
-
0.20
2/27/14
TITLE
Package Drawing Contact:
packagedrawings@atmel.com
18
8X, 8-lead 4.4mm Body, Plastic Thin
Shrink Small Outline Package (TSSOP)
AT25128B/256B [DATASHEET]
Atmel-8698E-SEEPROM-AT25128B-256B-Datasheet_012015
GPC
TNR
DRAWING NO.
8X
REV.
E
11.3
8MA2 — 8-pad UDFN
E
1
8
Pin 1 ID
2
7
3
6
4
5
D
C
TOP VIEW
A2
SIDE VIEW
A
A1
E2
b (8x)
8
7
1
D2
6
3
5
4
e (6x)
K
L (8x)
BOTTOM VIEW
Notes:
COMMON DIMENSIONS
(Unit of Measure = mm)
2
Pin#1 ID
1. This drawing is for general information only. Refer to
Drawing MO-229, for proper dimensions, tolerances,
datums, etc.
2. The Pin #1 ID is a laser-marked feature on Top View.
3. Dimensions b applies to metallized terminal and is
measured between 0.15 mm and 0.30 mm from the
terminal tip. If the terminal has the optional radius on
the other end of the terminal, the dimension should
not be measured in that radius area.
4. The Pin #1 ID on the Bottom View is an orientation
feature on the thermal pad.
SYMBOL
MIN
NOM
MAX
A
0.50
0.55
0.60
A1
0.0
0.02
0.05
A2
-
-
0.55
D
1.90
2.00
2.10
D2
1.40
1.50
1.60
E
2.90
3.00
3.10
E2
1.20
1.30
1.40
b
0.18
0.25
0.30
C
NOTE
3
1.52 REF
L
0.30
e
0.35
0.40
0.50 BSC
K
0.20
-
-
11/26/14
Package Drawing Contact:
packagedrawings@atmel.com
TITLE
8MA2, 8-pad 2 x 3 x 0.6mm Body, Thermally
Enhanced Plastic Ultra Thin Dual Flat No-Lead
Package (UDFN)
GPC
DRAWING NO.
REV.
YNZ
8MA2
G
AT25128B/256B [DATASHEET]
Atmel-8698E-SEEPROM-AT25128B-256B-Datasheet_012015
19
11.4
8U2-1 — 8-ball VFBGA
f 0.10 C
d 0.10
A1 BALL
PAD
CORNER
D
A
(4X)
d 0.08 C
C
A1 BALL PAD CORNER
2
1
Øb
A
j n0.15 m C A B
j n0.08 m C
B
e
E
C
D
(e1)
B
A1
d
A2
(d1)
A
TOP VIEW
BOTTOM VIEW
SIDE VIEW
8 SOLDER BALLS
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL
Notes:
1. This drawing is for general
2. Dimension 'b' is measured at the maximum solder ball diameter.
3. Solder ball composition shall be 95.5Sn-4.0Ag-.5Cu.
A
A1
A2
b
D
E
e
e1
d
d1
MIN
0.81
0.15
0.40
0.25
NOM
0.91
0.20
0.45
0.30
2.35 BSC
3.73 BSC
0.75 BSC
0.74 REF
0.75 BSC
0.80 REF
MAX
NOTE
1.00
0.25
0.50
0.35
6/11/13
TITLE
Package Drawing Contact:
packagedrawings@atmel.com
20
8U2-1, 8-ball, 2.35 x 3.73 mm Body, 0.75 mm pitch,
Very Thin, Fine-Pitch Ball Grid Array Package
(VFBGA)
AT25128B/256B [DATASHEET]
Atmel-8698E-SEEPROM-AT25128B-256B-Datasheet_012015
GPC
DRAWING NO.
GWW
8U2-1
REV.
G
12.
Revision History
Doc. Rev.
Date
8698E
01/2015
8698D
07/2014
Comments
Add the UDFN Expanded Quantity Option and ordering information.
Update the 8MA2 package outline drawing.
Update part markings, 8MA2 and 8U2-1 package drawings, package 8A2 to 8X, template,
logos, and disclaimer page. No change to functional specification.
Update 8A2 and 8S1 package drawings.
8698C
08/2011
Correct page 13, Device Density from 156K to 256K.
Correct page 9, table headings.
Correct cross references on pages 7, 8, and 9.
8698B
03/2010
8698A
12/2009
Update Catalog Numbering Scheme.
Update Ordering Information and package types.
Initial document release.
AT25128B/256B [DATASHEET]
Atmel-8698E-SEEPROM-AT25128B-256B-Datasheet_012015
21
XXXXXX
Atmel Corporation
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T: (+1)(408) 441.0311
F: (+1)(408) 436.4200
|
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© 2015 Atmel Corporation. / Rev.: Atmel-8698E-SEEPROM-AT25128B-256B-Datasheet_012015.
Atmel®, Atmel logo and combinations thereof, Enabling Unlimited Possibilities®, and others are registered trademarks or trademarks of Atmel Corporation in U.S. and
other countries. Other terms and product names may be trademarks of others.
DISCLAIMER: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right
is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN THE ATMEL TERMS AND CONDITIONS OF SALES LOCATED ON THE
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